Mill



H. P. TAYLOR.

MILL.

APPLICATION FILED SEPT. 26. 1921.

1,414,603, Patented May 2, 1922.

INVENTOR.

' ATTORNEY.

Y entree stares HARRY P. TAYLOR, 033 LOS ANGELES, CALIFORNIA.

earner castes.

MILL.

iaiacea.

. Specification of Letters Patent.

Original application filed June 29, 1920, Serial No. 392,807. Divided and this application filed September Los Angeles and State of California, have invented certain new and useful Improvements in Mills, of which the following is a specification.

My invention relates to mills of the type employing a drum in which the material to be reduced, together with reducing-bodies, such as bars, rods, balls, rollers or the like are confined, the drum being rotated or otherwise agitated to cause the reducing bodies to reduce the material to the desired degree of fineness. The drum is provided with a discharge end through which the material after being properly reduced is discharged automatically.

The mill forming the subject-matter of this invention is of a type similar to that shown in my co-pending application Serial No. 392,807, filed. June 29, 1920 on an 1 m provernent in mills of which this appllcatlon is a division. I

This invention is directed primarily to the discharge end of the mill, improved means having been provided whereby the material,

after being properly reduced, may be freely discharged from the mill, the size of the dis-' charge opening for the mill being adjustable,means also being provided whereby access may readily be had to the interior of the mill drum.

Briefly, my invention comprises a rotatable drum providedwith adischarge end,

the drum when not in operation, being open- At the discharge across its entire width. end of the drum I provide a hinged door rotatable with the drum and provided with a discharge slot so that when the'door is closed and the mill is in operation the material being reduced within the drum will discharged throughthe door. In the accompanying drawings, Fig. 1 illustrates in part sectional eleva tion a mill of my improved type; and

Fig. 2 is an end elevation of the mill of Fig. 1.

eferring to the drawings in deta1l,1 designates a drum, preferably provided with liners 2, the drum being supported at one end on rollers 3, the opposite end being mounted for rotation in a trunnion hearing 4.

Serial No. 503,424.

door 8 rotatable in a bearing 9 and hinged at 10 to a fixed support 11. The door is held closed by a locking member 12.

This door extends across the full width of the open end of the mill drum. The door is lined as indicated at 13, the liners being held in place by bolts 14 or in any other desired manner. The reducing comparts ment, that'is to say the interior of the drum 1, is designated 15. From an inspection of the drawings it will be seen that the door 8, together with its liners 13, has been provided on the side adjacent the reducing compartment with a continuous discharge opening 16. This discharge opening 16 communicates with discharge openings 17 on the exterior of the doorythe door at this side be-. ing provided at intervals with outwardlyextending .portions 18, four of these outwardly extending portions having been shown in the accompanying drawings. These outwardly-extending portions 18 make a break in the discharge openings 17 at the exterior of the door so that the material being discharged from the interior of the drum through the opening or slot 16 passes out through the openings 17 at each side of the projections 18. The purpose of the projections 18 is, of course, to maintain the door in one place, that is, to rigidly secure the central portion 19 to the concentric outer through the feed end and discharged through I the discharge openings 16 and 17, this dis charge of course being automatic.

It will be seen also that should it be de sired to examine the interior of the drum for any reason whatsoever, such as repairs, replacements, etc., it is merely necessary to open the door 8. This leaves the'entire end of the drum 1 open. Of course this constructi on has many advantages, as compared with reducing mills as now constructed wherein manholes and the like are provided, for by opening the door 8 it is an easy matter to reline the drum or effect any other repairs desired. In fact, as I have above stated, the

7 door may be swung open so as to observe the interior of the drum and replace the reducing bodies f ClQSllGtl while the mill 1s n actual operation.

It will be seen that the reducing bodies for instance if rods be employed, may be easily removed from the mill by merely pulling them out endwise and by reason of my improved construction it is not necessary in such removal of the rods to lift them' over the edgeof a flange or the like, thereby avoiding danger of the rods being bent or twisted cluring thelr removal.

I wish to call attention to the fact that the innerface of the door liners is inclined outwardly for the purpose of ensuring a free discharge of reduced material from the mill,

the inclined face also tending at all times to cause the reducing bodies to work rearwardly,thatis to say, toward the feed end of the'mill. V

It will be apparent from the foregoing that I have provided an open ended drum having a door at the discharge end thereof extending the full width of the drum, this door being provided with a continuous, uninterrupted slot for the'discharge of material from the drum.

It will be obvious that by providing an uninterrupted continuous discharge slot in the face of the door 8 adjacent the interior of the mill the danger of the reducing bodies .such as rods for example becoming caught one end of the drum and rotatable therewith,

said doorbeing provided with a continuous uninterrupteddischarge slot.

3. In a mill of the character described, the combination of a rotatable drum, a doorat one end of the drum rotatable therewith, said door being provided witlra continuous dis charge opening in one face thereof and with interrupted openings communicating therewith at the opposite face thereof, through which openings material is discharged from the mil V 4. In a mill of the character described, the combination of a rotatable drum, a door at one end thereof extending across the entire width of thedrum, said door being provided with openings "through which material may be discharged from the interior of the drum automatically as the drum is rotated.

5. In a mill of the character described, a drum having a discharge end, a door at said discharge end, liners for said door provided with a continuous discharge opening on their inner faces communicating with interrupted openings in the outer face of the door, said openings jointly constituting discharge open ings for the mill through which material is discharged from the mill.

6. In a mill'of the character described, a drum having a discharge end, a door for the mill defining the boundaries of an opening at the discharge end of the mill, said door being provided with a continuous opening through one face thereof. communicating with an interrupted opening 1n ts opposite face, said openings communicating with each other and constituting discharge openings for the mill.

7. In a mill of'the character described, the combination of a rotatable drum, a idoor at one end of the drum and rotatable therewith, said door being provided with an endless discharge opening in one face thereof andwith interrupted openings communicating therewithin the opposite face, and means for adjusting the area of said interrupted openings;

8. In amill of the character described, the combination of a rotatable drum, a door atone end of the drum and rotatable therewith, said door being provided with aslot extend ing uninterruptedly for a complete turn about the axis of rotation of the drum.

9. In a mill of the character described, the combination of a rotatable drum and a door at one end ofthe drumand -mounted independently of "thedrum,'said {door being pro vided with a slot constituting a discharge opening for the mill. 7 V

This specification signed this'24th' day of September, 1921. v I

' H RRY P. TAYLOB. 

